Improvement in drills for boring wells



UNITED STATES PATENT Ormea.

JOHN SHEFFIELD, OF PUTNEYVILLE, NEWT YORK.

IMPROVEMENT lN-DPLILLS FOR. BORING WELLS.

Specification forming part of Letters Patent No. 45369. dated Januaryl0, 1865.

T0 all whom, t may concern:

Be it known that I, JOHN SHEFFIELD, of Putney ville, in the countyofWayne and State of New York, have invented a new and Improved Drillfor Boring Artesian Oil-Wells; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, which willenable others skilled in the art to make and use the same, referencebeing had to the accompanying drawings, forming part of thisspecitication, in which- Figure l is an elevation of my invention shownapplied to its work; Fig. 2, a detached elevation of the same, showingan edge view of the cutters.

Similar letters of reference indicate like parts.

This invention has for its object the constructing of a drill in such amanner that it will be capable of expanding and enlarging the bore orshaft of an Artesian well at its bottom.

The invention is more especially designed for enlarging the bottoms ot'oil-wells so as to open more veins than the ordinary bore or shat't willintersect, and cause the well to be more productive than it otherwisewould be.

A represents the shaft or rod to which my improved drill is attached.The lower end of this rod is bent or curved so as to have an obliquearm, B, as shown clearlyin Fig. l. This arm is slotted longitudinally toreceive the upper' end of a bar, O, which is secured in B by a pivot7 c.

The lower end of the bar Gis beveled at both sides to form achisel-edge, cx, and it is tted in the upper end of a bar, D, which isconstructed of a single piece, and bent or doubled, as shown clearly inFig. 2, the bar O being tted between the two sides or parts of D andsecured therein by a pivot, b. The edges of the two parts of the bar Dat its outer side are beveled to i'orm sharp or chisel edges, (1X, theupper parts of' said edges being slightly rounded where they cross thebar C, as shown in Fig. l.

From this description it will be seen that wh en the drill is insertedinto the bore or shaft and the lower end of the bar D comes in contactwith the bottom of the well the cut- .ting'edges of the bars C D will beforced outward, and as the drill is operated the bore or shaft of thewell at its bottom is enlarged. This will be fully understood byreferring to Fig. l, in which E represents a vertical section of a well,F being the shaft or bore.

Thus by this simple implement I am enabled to enlarge the bottoms ot'oil-wells and render the same much more productive than they otherwisewould be, in consequence of the enlarged area ot'the bottom interseet-in g and tapping more veins than could be reached andintersected by the bore or shaft above the enlargement.

l claim as new and desire to secure by Letters Patent- A drill forArtesian wells, composed of the chisel-bars G D and bent or oblique armB ot' the drill-rod A, connected together by pivots, and arrangedsubstantially as and for the purpose herein set forth.

JOHN SHEFFIELD.

Witnesses GHAs. R. HAVEN, W. S. THRoor.

